Chromium complexes of sulfo group containing disazo compounds having a resorcinol biscoupling component radical

Abstract

Water-soluble, anionic, chromium complexes of disazo compounds, at least one of the complex-forming disazo compounds being of the formula, <IMAGE> in which <IMAGE> is the radical of a carboxy group-containing diazo component of the benzene or naphthalene series, the carboxy group being ortho to the azo group and the diazo component being free from other metallizable groups, and B- is the radical of a diazo component of the benzene or naphthalene series free from metallizable substituents, which complexes contain at least one water-solubilizing group, are in free acid or salt form and are useful for dyeing and printing substrates such as natural and synthetic polyamides, polyurethanes and anodized aluminum, particularly fur-lined leather.

What is claimed is: 
     
       1. A 1:2 chromium complex of the formula ##STR15## or a salt thereof. 
     
     
       2. A salt of a 1:2 chromium complex according to claim 1 having the formula ##STR16## 
     
     
       3. A lithium, sodium or potassium salt of a 1:2 chromium complex according to claim 2. 
     
     
       4. A sodium salt of a 1:2 chromium complex according to claim 3. 
     
     
       5. A 1:2 chromium complex of the formula ##STR17## or a salt thereof. 
     
     
       6. A sodium salt of a 1:2 chromium complex according to claim 5.